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Methylrosanilinium Chloride (International)

Note: In some countries, this medicine may only be approved for veterinary use.



CAS registry number (Chemical Abstracts Service)


Chemical Formula


Molecular Weight


Therapeutic Categories


Antifungal agent

Anthelmintic agent

Antiseptic agent, topical

Chemical Names

N-[4-[Bis[4-(dimetylamino)phenyl]metylene]cyclohexa-2,5-dienylidene]-N-metylmetanaminium chloride (hexametyl-p-rosanilinium chloride) (BP, Ph. Eur.)

[4-[Bis[p-(dimetyl-amino)phenyl]metylene]-2,5-cyclohexadien-1-ylidene]-dimetylammonium chloride (USAN)

Benzenemetanol, 4-(dimetylamino)-α,α-bis[4-(dimetylamino)phenyl]-, hydrochloride

Metanaminium, N-[4-[bis[4-(dimetylamino)phenyl]-metylene]-2,5-cyclohexadien-1-ylidene]-N-metyl-, chloride (USAN)

Foreign Names

  • Methylrosanilinii Chloridum (Latin)
  • Methylrosanilinium chlorid (German)
  • Chlorure de Méthylrosanilinium (French)
  • Cloruro de metilrosanilina (Spanish)

Generic Names

  • Méthylrosanilinium (chlorure de) (OS: DCF)
  • Methylrosanilinium Chloride (OS: BAN, JAN)
  • Basic violet (IS)
  • Cl 42555 (IS)
  • Crystal violet (IS)
  • Crystalloviolaceum (IS)
  • Gentian Violet (IS)
  • Gentianaviolett (IS)
  • Methylrosanilinium chloratum (IS)
  • Metilrosanilino cloruro (IS)
  • Violet cristallisé (IS)
  • Violeta de Genciana (IS)
  • Crystal Violet (PH: BP 1980)
  • Gentian Violet (PH: USP 41)
  • Methylrosanilinii chloridum (PH: Ph. Eur. 9.4, Ph. Int. 7)
  • Methylrosanilinium chloratum (PH: Ph. Helv. VI)
  • Methylrosanilinium Chloride (PH: BP 2018, JP XVII, Ph. Int. 7)
  • Methylrosanilinium chloride (PH: Ph. Eur. 9.4)
  • Methylrosaniliniumchlorid (PH: Ph. Eur. 9.4)
  • Violet cristallisé (PH: Ph. Franç. 11)

Brand Names

  • 1% Spirytusowy roztwor fioletu gencjanowego Gemi
    Gemi, Poland
  • 1% Wodny roztwor fioletu gencjanowego Gemi
    Gemi, Poland
  • 2% Spirytusowy roztwor fioletu gencjanowego Gemi
    Gemi, Poland
  • 2% Wodny roztwor fioletu gencjanowego Gemi
    Gemi, Poland
  • Aerotet forte [+ Oxytetracycline] [veterinary use]
    Virbac, New Zealand
  • Cristal Violetto
    Marco Viti Farmac., Italy; Sella, Italy; Zeta Farm., Italy
  • Faxet [+ Lidocaine]
    Laboratorios Euromed Chile, Chile
  • Fungol [+ Malachite Green] für Süsswasserzierfische [veterinary use]
    Keller, Switzerland
  • Gencjana 0.5%
    Hasco-Lek, Poland
  • Gencjana 1%
    Hasco-Lek, Poland
  • Gentiane Violet
    Laboratoire Atlas, Canada
  • Metilrosanilinio Cloruro
    Nova Argentia, Italy
  • Pyoctanini 3% [veterinary use]
    Chema-Elektromet, Poland
  • Solutio Pyoctanini Galen-Pharma
    Galen, Bulgaria
  • Tetravet [+ Oxytetracycline] [veterinary use]
    Bayer New Zealand, New Zealand
  • Vigencial
    Aldo Union, Spain
  • Violeta Genciana 2% Valma
    Laboratorio Valma, Chile


BANBritish Approved Name
DCFDénomination Commune Française
ISInofficial Synonym
JANJapanese Accepted Name
OSOfficial Synonym
PHPharmacopoeia Name
Rec.INNRecommended International Nonproprietary Name (World Health Organization)
USANUnited States Adopted Name

Further information on drug naming conventions: International Nonproprietary Names.

Important Notice: The international database is in BETA release. This means it is still under development and may contain inaccuracies. It is not intended as a substitute for the expertise and judgement of your physician, pharmacist or other healthcare professional. It should not be construed to indicate that the use of any medication in any country is safe, appropriate or effective for you. Consult with your healthcare professional before taking any medication.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.